Safe deleting data on hard disk

Discussion in 'Mac Basics and Help' started by CmdrLaForge, Jul 5, 2006.

  1. CmdrLaForge macrumors 68040

    CmdrLaForge

    Joined:
    Feb 26, 2003
    Location:
    around the world
    #1
    Hello,

    I have some private confidential data on an external firewire drive that I have to send in for repair. I would like to secure delete all my data on that drive.

    How can I do that?

    Thanks for your help
    LaForge
     
  2. Blue Velvet Moderator emeritus

    Joined:
    Jul 4, 2004
    #2
    Use Disk Utility and reformat it using the 8x or 35x write zero option which writes many zeros all over the thing. But be warned, this can take a looooong time; it's the kind of thing you may need to leave running overnight or during the day when you're out.
     
  3. CmdrLaForge thread starter macrumors 68040

    CmdrLaForge

    Joined:
    Feb 26, 2003
    Location:
    around the world
    #3
    Thanks a lot. Is 8x faster?

    Cheers
    LaForge
     
  4. yellow Moderator emeritus

    yellow

    Joined:
    Oct 21, 2003
    Location:
    Portland, OR
    #4
    7-pass is definitely faster..

    You need to weigh your paranoia against the eventuality of someone scraping your data off the HD.
     
  5. WildCowboy Administrator/Editor

    WildCowboy

    Staff Member

    Joined:
    Jan 20, 2005
    #5
    It's actually 7-pass, not 8-pass...and it should be five times as fast as 35-pass. It will still take many hours. 35-pass will likely take multiple days.
     
  6. regre7 macrumors 6502

    Joined:
    Apr 18, 2006
    Location:
    Atlanta, GA
    #6
    No, those won't work. The only way to securely delete your data is to open all of your confidential documents and drip a drop of lemon juice where the 'B', 'V', and 'SPACE' keys meet, and then move the screen to a 43 degree angle to the keyboard, moving it to a perpendicular position every two minutes, then immediately moving it back. All this while singing Voodoo Child by Hendrix.

    Unless your hair is brown or dark blonde.
     
  7. CmdrLaForge thread starter macrumors 68040

    CmdrLaForge

    Joined:
    Feb 26, 2003
    Location:
    around the world
    #7
    Thanks you made my day!

    I don't mind if it takes some hours. Its just private data I don't want to get into the hands of anybody. The drive is DOA that usually means that I will not get my own drive back but a completly different one. I never erase disks e.g. when I just send my Mac in to Apple for repair. But this is different
     
  8. yellow Moderator emeritus

    yellow

    Joined:
    Oct 21, 2003
    Location:
    Portland, OR
    #8
    If the drive is DOA, will you even be able to erase it?
     
  9. CmdrLaForge thread starter macrumors 68040

    CmdrLaForge

    Joined:
    Feb 26, 2003
    Location:
    around the world
    #9
    Yes because I already copied all my data over. The drive is DOA because it arrived with some quite ugly scratches. It is a LaCie BigDisk 500MB. Expensive but good. At first I thought I can live with all the scratches and let it go because I wanted to start working. That was yesterday. Today I think I paid so much money that there shouldn't be scratches.... And they should know that this happens and they should take better care in manufacturing. So my guess is the distri just sends me a knew one - the cover will be replaced in the factory and then shipped to a new customer - better not with my data
     

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